Your package fails to build with the newest autoconf-2.71, which was part of a recent wide Fedora change. More information about Fedora autoconf Change available here: https://fedoraproject.org/wiki/Changes/Autoconf_271#How_To_Test. The easiest way to reproduce the problem is to execute a fedora scratch-build on your package. Thank you for cooperation!
This should be fixed with https://src.fedoraproject.org/rpms/pveclib/pull-request/1
Fixed with pveclib-1.0.4.4-7.fc36 Update: https://bodhi.fedoraproject.org/updates/FEDORA-2021-0109217ab8